DD,
I believe the bible speaks very clearly for the most part.
Perhaps because the Bible is not that religious (or "spiritual") after all...
Also, whatever sounds clear (and generally pertains to topics which have only a fringe connection with religion, such as ethics) is often just as clearly contradicted elsewhere.
When the Bible texts happen to deal with theology in the strictest sense ("who/what is God"), which is pretty rare after all, they naturally become ambiguous and obscure. Many Bible features (such as the prohibition of divine images, Yhwh inhabiting darkness, his voice as the sound of silence in the OT) clearly (!) point to this essential obscurity. The Johannine literature which is the most theologically audacious (daring to say what God is) culminates in metaphors (God is "spirit," "light" or "love") and is full of intended misunderstandings... Cf. also the Gospel parables, which, in spite of the secondary allegorical "interpretations," are said to be designed so as to be misunderstood (at least by outsiders).
its not just "religious speech", Bill Clinton for example, claims the word "is" contains ambiguity.
Not being American I'm afraid I miss your allusion, but out of context I certainly agree. "To be" (which Derrida said is the only non-metaphorical word in the lexicon -- and I'm not sure it is really metaphor-free) is a highly ambiguous word and notion. In the middle-ages Duns Scot devoted an entire treaty to the "univocity (vs. plurivocity) of being"... Would you say your mind isin the same sense a rock or a tree is? What about God, or the devil, or a fictional character in a book? Your definition of "being" will probably vary according to the "object".